Chain-pump



M. LTBMPLB. i Y y Chain Pump. No; 237,142. A P afenfed Feb. 1', 188|.

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-WITNESSES N.FETEH8. PMDWUTHOGHAPMER, WQNINGTON. D, C.

UNITED STATES PATENT OFFICE.

MORRIS D. TEMPLE, OF CHICAGO, ILLINOIS.

CHAIN-PUMP.

SPECIFICATION forming' part of Letters Patent No. 237,142, datedFebruary 1, 1881.

Application filed August 22, 1879.

To all whom it may concern Beit known that I, MORRIS D. TEMPLE, ofChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Fixtures for Endless-Chain Pumps,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

Figure 1 is a perspective view of my improved xtures as they appear whenattached to the pump-curb and viewed from the side opposite the crank orleft side of the curb. Fig. 2 is a plan view of a horizontal sectionthrough the center of the Wheel-shaft, with the pump-curb inperspective. Fig. 3 isA a Yperspective view of the ratchet-box or coverfor the ratchet-Wheel with a segment of one of its sides removed,showing a portion of its iuterior chamber and the ratchet-Wheel inposition with its check or roller which controls the revolution of theshaft. Fig. 4 is a verti cal central section of ther ratchet-box, alsoofits wheel and shaft, taken on the line of the axis of the shaft. Fig. 5is a perspective View of the check or roller. Fig. 6 represents acrosssection of one of the forks of the chain-wheel, taken near itsbase.

The arrows indicate the direction of motion of the several parts.

Like letters of reference indicate like parts.

My invention relates to that class of machines designed to transmitmotion to an endless chain provided with buckets for raising waterthrough a tube. Those in common use are defective chiefly in the ratchetand pawl, which, slow in action, permit a reverse motion of the chain'ofseveral inches before arresting it, thereby damaging and sometimesdestroying the rubber buckets attached to the chain. This reversemotion, caused by the weight of water in the tube, is very rapid, and bythe time the pawl engages with the ratchet the momentum acquired is sogreat as to cause aviolent shock, often breaking either the pawl, forksof the wheel, or chain. In cold weather the ratchet and pawl, beingunprotected from the water thrown 0E by the chain and buckets, becomeincrusted with ice, causing the pawl 5o to slip on the ratchet andpermitting the chain t0 run back with great velocity, thus ruining thebuckets and injuring any person who may be Within reach of therapidly-revolvin g crank. At best the ordinary ratchet and pawl are verynoisy. In my improved fixtures these serious defects are all entirelyovercome.

In the accompanying drawings, S represents the shaft in its right andleft bearings g and b W, the forked chain-wheel; B, the ratchet- Wheel;B, the ratchet-box or housing for the ratchet-wheel, and C the crank.The crank C, chain-wheel W, and ratchet-wheel R are fitted to the shaftby self-locking joints.

The ratchet-box B, cast in one piece, is formed by the plates or sides dd and the curved plate or rim e e. One of the sides, d', is nearlysemicircular in form, with lateral extensions to e', where the curvedplate or rim e e makes a descending turn. Projecting from the side d ofthe ratchet-box B is a screw-plate, 10,105' which the ratchet-box B issecured to the pump-curb A. Formed upon the screw-plate p, and adjoiningthe side d of the ratchet-box B, is the bearing b for the left end oftheshaft S. The inner side, d d', of the ratchetbox B is perforated ato, toallow the end of the shaft S t0 pass through it to its bearing b, and isextended below'the shaft sufciently to shield the ratchet-wheel from theWater thrown off by the chain and buckets. The ratchet-box is left openon its lower edge, and through the opening so formed the ratchet-wheelis passed, after which it is fastened upon its shaft, the roller r beingfirst passed into the box at the same time with its wheel. The interiorchamber of the ratchet-box B nearly conforms in shape to its exterior,having the bay or recess n formed by the lateral extension of the sidesd df, a portion of the curved plate or rim e e', and the inclined platez'. The plate i is in a plane oblique to the plane of the horizon, andserves as an inclined track for the cylindrical roller r to move upon..Within the interior chamber, c, of the ratchet-box revolves theratchet-wheel on the shaft S, to which it is irmly secured. Theperiphery of the ratchetwheel is formed into hook-shaped teeth t, allsimilarly formed, having each a concave side to fit over and clutch thecylindrical roller r, and a convex side so formed as to easily move theroller up the inclined track out of its way. The roller r is made ofmetal turned and cnt IOO fgreatly strengthening the plate l, and thereof proper size to roll freely on the inclined plane i', inclosed by thewalls d d and t" and ratchet-wheel. lt constantly rolls down theinclined platte, and rests against it and the ratchet-wheel.

When the several parts of my improved tixture are set together andplaced in position, it is clearly seen that the roller rotfers noresistance to the revolution of tite shaft S and its attachments iu theproper direction, beingl suecessvely met and rolled upthe ittclinedtrack by the convex facesof the teeth f of tite ratchetwheel.

It is further observed that thc force of grav ity constantly draws theroller back down the inclined platte ast'ar as the ratchet-wheel willpermit, and that the instant the revolution of the shaft ceases or areverse motion begins it blocks the ratchet-wheel by rollingr under theconcave face or edge of one of its teeth, thereby preventing a reversemotion. The roller, being small and light, tnakes bttt little, noise,and may be made perfectly noiseless by covering it with rubber. Theratchet with its roller is thus protected from water and eonsequeut icein winter.

The improvement of the chaitrwheel is in tite form of its forks, each ofwhit-h consists of a. curved plate, F, provided with curved prongs Fandthc bracef, as shown, the brace by preventing it from breaking ott', asis apt to be the case. A crosssectiou of the parts cut at the base nearthe ritn \\Y is shown in Fig. 6.

What I clailn is- 1. In chain-pump fixtures, the ratchet-box B, havingthe interior chamber, c, recess il, in* clined track i, shaft-bearingrl, and screwplate p.

2. A. ratcl|et-wheel provided with teeth t, the longer surfaces of whichare convex aud t the shorter concave, in combination with a recess, n,provided with an inclined track, i, and loose roller, all combined andoperated as det scribed.

3. A ratchet-wheel provided with a box or l housing open on one side,and provided with i a chamber or recess, n, having an inclined track, incombination with a roller, r, for the pttrpose shown and described.

4. The housing l ot' a ratchet-wheel, provided vvith side 1, to which isattached a screwplate, p, provided with a shaft-bearing, and side tI',provided with opening o, recess n, having inclined platte i, and openingon the under side thereof, as herein described.

5. The housingr B of' a ratchet-wheel, provided with side d, having ascrew-plate,p, and shaft-bearingr b, side d', extending to or beyond thelower edge of the ratchet-wheel, and provided with the opening o,constructed as and for the purpose specified.

6. TheY combination ot' the ratchet-box B, provided with theupwardly-inclined track t', ratchet-wheel It, roller r, and shaft s,substantially as anti for the purpose specilied.

't'. The housing l) ot' a ratchet-wheel, provided with chatnber a,having inclined track i, side 1, provided with screw-platep andshaftbeariug I, side t1', provided with opening o, the side il'extending beyond the lower edge of the ratchet-wheel, as shown anddescribed.

The housing of a ratchet-wheel provided with sides I and d', extendingbeyond the periphery of the ratchet-wheel and covered by a ritn, e,provided with a recess, n, and inclined track i, one of said sides beingprovided with an opening, o, and the other with a plate, p, andshaft-bearing I1, substantially as and for the purpose specified.

.i. A chain-pump wheel provided with forks F l", braced by braces f,placed upon the rear side ot' tite part 1, substantially as and forthepurpose specified.

lo. 1u chaiu-ptttnp fixtures, the combination, with tite chain-pun1pWheel W, provided with forks l, substantially as described, of the shaftS, ratchet-wheel R, ratchet-box B, provided with track i, and roller 1',constructed substantially as shown and described.

MORRIS D. TEMPLE.

Witnesses JAMES 1l. THREW, HENRY l. WAGENKNECHT.

